Benzyl chloroformate → HCID 86623367, compound

Participants

Reaction Steps

24.8 g of 3-(2-thienyl)alanine (144.8 mmol) were added in portions to 11.0 g of LiAlH4 in 550 ml of tetrahydrofuran, heated to reflux. The mixture was then heated under reflux for 8 hours and subsequently stirred at room temperature overnight. 17.6 ml of 10% NaOH solution were added and then 22 ml of H2O were slowly added dropwise, and the mixture was stirred for 5 minutes. Then, first 391 ml of 10% NaOH solution and subsequently, at −5° C., 22.2 g of benzyl chloroformate (130.32 mmol) were added, and the mixture was stirred at room temperature for 3 hours. For workup, the mixture was extracted with dichloromethane, the organic phase was dried, the solvent was evaporated and the remaining residue was filtered through silica gel (eluent: CH2Cl2/methanol 2.5%). 36.8 g of the title compound were obtained as a yellowish oil.

Provenance & Evidence